Support override CLANG_RESOURCE_DIR

The result from clang commandline is something like
/usr/lib/llvm-7/lib/clang/7.0.1

Which means I need to recompile when the clang is upgraded to newer 7.x.x

However the system has a convenient symlink, which is
/usr/include/clang/7.
This commit is contained in:
Shengjing Zhu 2019-08-11 18:06:47 +08:00 committed by Fangrui Song
parent 689c19a5af
commit 07ed9902e0

View File

@ -120,22 +120,24 @@ endif()
# Find Clang resource directory with Clang executable. # Find Clang resource directory with Clang executable.
find_program(CLANG_EXECUTABLE clang) if(NOT CLANG_RESOURCE_DIR)
if(NOT CLANG_EXECUTABLE) find_program(CLANG_EXECUTABLE clang)
message(FATAL_ERROR "clang executable not found.") if(NOT CLANG_EXECUTABLE)
endif() message(FATAL_ERROR "clang executable not found.")
endif()
execute_process( execute_process(
COMMAND ${CLANG_EXECUTABLE} -print-resource-dir COMMAND ${CLANG_EXECUTABLE} -print-resource-dir
RESULT_VARIABLE CLANG_FIND_RESOURCE_DIR_RESULT RESULT_VARIABLE CLANG_FIND_RESOURCE_DIR_RESULT
OUTPUT_VARIABLE CLANG_RESOURCE_DIR OUTPUT_VARIABLE CLANG_RESOURCE_DIR
ERROR_VARIABLE CLANG_FIND_RESOURCE_DIR_ERROR ERROR_VARIABLE CLANG_FIND_RESOURCE_DIR_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_STRIP_TRAILING_WHITESPACE
) )
if(CLANG_FIND_RESOURCE_DIR_RESULT) if(CLANG_FIND_RESOURCE_DIR_RESULT)
message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \ message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \
executable. Output:\n ${CLANG_FIND_RESOURCE_DIR_ERROR}") executable. Output:\n ${CLANG_FIND_RESOURCE_DIR_ERROR}")
endif()
endif() endif()
set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS